1. Trim the fillet and slit it lengthwise. Unfold and pound flat.
2. Mix butter, parsley, salt, and pepper and spread the mixture on the fillets.
3. Fold them together and tie with string.
4. Brown the fillet well all around in butter for 5 minutes.
5. Continue to cook covered for 5 minutes.
6. Remove the fillet from the pan, add bouillon, and boil.